#include <signal.h>
#include "libpq-fe.h"

Include dependency graph for cancel.h:

This graph shows which files directly or indirectly include this file:

Functions
void	SetCancelConn (PGconn *conn)

void	ResetCancelConn (void)

void	setup_cancel_handler (void(*query_cancel_callback)(void))

Variables
PGDLLIMPORT volatile sig_atomic_t	CancelRequested

Function Documentation

◆ ResetCancelConn()

void ResetCancelConn ( void )

Definition at line 107 of file cancel.c.

{
    PGcancel   *oldCancelConn;
 
#ifdef WIN32
    EnterCriticalSection(&cancelConnLock);
#endif
 
    oldCancelConn = cancelConn;
 
    /* be sure handle_sigint doesn't use pointer while freeing */
    cancelConn = NULL;
 
    if (oldCancelConn != NULL)
        PQfreeCancel(oldCancelConn);
 
#ifdef WIN32
    LeaveCriticalSection(&cancelConnLock);
#endif
}

References cancelConn, and PQfreeCancel().

Referenced by CheckConnection(), consumeQueryResult(), do_connect(), do_lo_export(), do_lo_import(), do_lo_unlink(), executeMaintenanceCommand(), HandleCopyResult(), PSQLexec(), PSQLexecWatch(), runInitSteps(), SendQuery(), and wait_on_slots().

◆ SetCancelConn()

void SetCancelConn ( PGconn * conn )

Definition at line 77 of file cancel.c.

{
    PGcancel   *oldCancelConn;
 
#ifdef WIN32
    EnterCriticalSection(&cancelConnLock);
#endif
 
    /* Free the old one if we have one */
    oldCancelConn = cancelConn;
 
    /* be sure handle_sigint doesn't use pointer while freeing */
    cancelConn = NULL;
 
    if (oldCancelConn != NULL)
        PQfreeCancel(oldCancelConn);
 
    cancelConn = PQgetCancel(conn);
 
#ifdef WIN32
    LeaveCriticalSection(&cancelConnLock);
#endif
}

References cancelConn, conn, PQfreeCancel(), and PQgetCancel().

Referenced by consumeQueryResult(), do_lo_export(), do_lo_import(), do_lo_unlink(), executeMaintenanceCommand(), HandleCopyResult(), PSQLexec(), PSQLexecWatch(), runInitSteps(), SendQuery(), and wait_on_slots().

◆ setup_cancel_handler()

void setup_cancel_handler ( void(*)(void) query_cancel_callback )

Definition at line 183 of file cancel.c.

{
    cancel_callback = query_cancel_callback;
    cancel_sent_msg = _("Cancel request sent\n");
    cancel_not_sent_msg = _("Could not send cancel request: ");
 
    pqsignal(SIGINT, handle_sigint);
}

References _, cancel_callback, cancel_not_sent_msg, cancel_sent_msg, handle_sigint(), and pqsignal.

Referenced by main(), psql_setup_cancel_handler(), and runInitSteps().

Variable Documentation

◆ CancelRequested

PGDLLIMPORT volatile sig_atomic_t CancelRequested

extern

Definition at line 59 of file cancel.c.

Referenced by handle_sigint(), initPopulateTable(), main(), reindex_one_database(), select_loop(), and vacuum_one_database().